Breaking: #69148 - Backend Module Dispatching removed¶
Dispatching Backend modules through custom dispatchers have been removed. The corresponding Extbase functionality called "ModuleRunner" and its Interface have been removed as well.
Any dispatcher registered via
$TBE_MODULES['_dispatcher'] is not evaluated anymore.
All TYPO3 Instances with an extension that registers a custom backend module dispatcher.
Use a custom RequestHandler.